Say Hello to EPS

The smart, easy way to assess a home’s energy performance

Energy use and carbon footprint are important factors to consider when buying, building or making energy-efficiency upgrades to your home. Both factors affect a home’s operating costs, performance and impact on the environment.

EPSTM, brought to you by Energy Trust of Oregon, is an energy performance scoring system which takes these factors into consideration, making it easy to see the energy efficiency of your home. The lower the score, the better—a low EPS identifies a home as energy-efficient with a smaller carbon footprint and lower energy costs. A home’s EPS can range from zero to 200+—zero being the most efficient, 200+ being the least.

How does EPS work?

EPS is a calculation—based on a range of factors—that makes it easy to compare newly built homes based on energy efficiency and expected energy costs. It helps homebuyers evaluate behind-the-walls features that affect a home’s performance.

Energy score and carbon footprint calculations

Energy score

Displayed in millions of Btu per year. A Btu or British Thermal Unit is measurement of the heat content of fuel. One Btu=the energy produced by a single wooden match.

Annual kWh + Annual therms=Annual MBtu

293                  10

Carbon footprint

A home’s energy consumption affects carbon emissions and impacts the environment. The carbon calculation for EPS is based on emissions from the utility-specific electricity generation method and natural gas consumption of the home.

For electricity: The carbon score is based on emissions from producing electricity from this home's provider. 200 to 1,884* kWh results in 1 ton of carbon, depending on the utility specific electricity generation method.

For natural gas: The carbon score is based on emissions of burning natural gas from the home’s provider. 171 therms equal 1 ton of carbon.

Learn more about receiving an EPS for: